Fahrenheit Sensor LM34 (CB14400E)

This circuit measures temperatures from +5 to + 300º F using a sensor from National Semiconductor not very easy to obtain.

Negative Voltage Regulator (CB15903E)
This circuit is suggested by National Semiconductor and makes use of the negative regulator LM2990...
200 W amplifier for the car (CB8961E)
This circuit was found in a 90s Radio Electronics. MOSFETs must have excellent heat sinks and heat and...
Vibrating Wire Oscillator 2 (CB23900E)
An oscillator slightly different from the previous one also appeared in Radio Electronics magazine in...